Solution Found!
Determine the electron geometry, molecular geometry, and
Chapter 10, Problem 35E(choose chapter or problem)
Determine the electron geometry, molecular geometry, and idealized bond angles for each molecule. In which cases do you expect deviations from the idealized bond angle?
a. PF3 b. SBr2
c. CHCl3 d. CS2
Questions & Answers
QUESTION:
Determine the electron geometry, molecular geometry, and idealized bond angles for each molecule. In which cases do you expect deviations from the idealized bond angle?
a. PF3 b. SBr2
c. CHCl3 d. CS2
ANSWER:Step 1 of 4
(a)
According to the Lewis theory,
Number of valence electrons for P atom = 5
Number of valence electrons in F atom = 7
Total number of valence electrons in .
This gives four electron groups on the central P atom. So electron geometry is tetrahedral.
According to VSEPR theory, since there are 3 bonding groups and 1 lone pair, the molecular geometry is trigonal pyramidal.
It has an idealized bond angle of . Due to lone pair repulsion, we can expect a deviation from the idealized bond angle.
Therefore, electron geometry is is , molecular geometry is and ideal bond angle .